/*公共样式表*/
* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body, html {
    width: 100%;
    height: 100%;
}

a {
    color: black;
    text-decoration: none;
}

input {
    outline: none;
    background-color: white;
    border: 1px black solid;
}

button {
    outline: none;
    background-color: white;
}

li{
    list-style: none;
}

/*弹性布局居中*/
.layout-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

/*弹性布局等距间隔*/
.layout-spaceBetween {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
